In this study, pitch for melt-electrospinning was prepared from naphtha cracking bottom (NCB) oil by modification with heat
treatment. The softening point and property of the modified pitch was influenced by modification conditions such as nitrogen
flow rate, heat treatment temperature, and reaction time. From among these, heat treatment temperature had a very strong
influence on distribution of molecular weight and softening point of pitch. The C/H mole ratio and average molecular weight
was increased with increasing the heat treatment temperature due to decomposition and cyclization reaction of surface-functional
groups. In addition, the values of benzene insoluble (BI) and quinoline insoluble (QI) have also tend to decrease, and
the width of molecular weight distribution seems to get more narrow. Carbon fiber in diameter of 4.8 μm was prepared from
modified pitch with softening point in 155 ℃ by melt-electrospinning. It is believed that melt-electro spinning method is much
more convenient to get the thinner fiber than conventional melt spinning method.